In THR's exclusive clip from Tuesday's season finale, Jimmy shows he isn't afraid to question his boss.

Firehouse 51 has seen its fair share of feuds in the past on Chicago Fire, but nothing quite like this.

Jimmy (Steven R. McQueen) suffered a devastating loss in the season's penultimate episode when his older brother and fellow firefighter, Danny (Andy Ahrens), couldn't get out in time during a building-collapse call.

Coincidentally, it was none other than Jimmy's boss, Chief Boden (Eamonn Walker) who gave Danny the green light to stay inside the building longer when he thought he heard someone who was still inside and in need of saving.

That makes things very complicated when Jimmy decides to return to work not long after his brother's death. In The Hollywood Reporter's exclusive video from Tuesday's season-four finale, Jimmy doesn't even try to hide his contempt for his boss.

"We saved a life today. What about you?" Jimmy asks Boden in the video. "As a chief, you do a lot of telling people what to do without actually doing very much yourself."

Suffice it to say, Boden does not take kindly to Jimmy's questioning of him. So how does he react? Watch the exclusive video to find out.